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Boxstard · 04-07-2022, 04:36 PM

Time to get a set of new summer tires.

Running 205/50 front and 255/40 rear on 17” wheels now. I want Michelin Pilot Sport 4S but no matching sizes available.

I’m wondering if 215/45 and 245/40 tires work as good, since diameter difference is only 1%? I think 255 is a bit overkill for my 2.5 anyway, so won’t mind going a bit narrower for rears, while a bit wider fronts reduce built-in understeer altogether. And a bit smaller diameter and 1 pound lighter weight probably help acceleration, if anything.

Anybody running the combo?

04-07-2022, 04:36 PM	#1
Boxstard Registered User Join Date: Apr 2016 Location: SE Michigan Posts: 497	New summer tires Time to get a set of new summer tires. Running 205/50 front and 255/40 rear on 17” wheels now. I want Michelin Pilot Sport 4S but no matching sizes available. I’m wondering if 215/45 and 245/40 tires work as good, since diameter difference is only 1%? I think 255 is a bit overkill for my 2.5 anyway, so won’t mind going a bit narrower for rears, while a bit wider fronts reduce built-in understeer altogether. And a bit smaller diameter and 1 pound lighter weight probably help acceleration, if anything. Anybody running the combo? __________________ 1997 Boxster arctic silver/ red, XNE riveted mahogany/ leather steering wheel & 917-style wood shift knob, Ben’s short shifter, PSE, 996 TB, UDP, stereo/ center console delete, hardtop and speedster humps, daily driver rain or shine or snow!